Question

If ABC is a right angle isosceles triangle, then find its greatest angle ?
1. 90°
2. 180°
3. 120°
4. 60°
Please answer correct and fast
and who will answer correct I will mark him or her as brainliest ​

Answer 1

$\underline{\textsf{Given:}}$

$\textsf{ABC is a right angle isoceles triangle}$

$\underline{\textsf{To find:}}$

$\textsf{The greatest angle of triangle ABC}$

$\underline{\textsf{Solution:}}$

$\textsf{Since ABC is a right angle isoceles triangle, we take}$

$\mathsf{\angle{A}=90^{\circ}}$

$\textsf{We know that,}$

$\textsf{"Sum of all the angles of triangle is}\;\mathsf{180^{\circ}"}$

$\implies\mathsf{\angle{A}+\angle{B}+\angle{C}=180^{\circ}}$

$\implies\mathsf{90^{\circ}+\angle{B}+\angle{C}=180^{\circ}}$

$\implies\mathsf{\angle{B}+\angle{C}=90^{\circ}}$

$\implies\mathsf{\angle{B}\,<\,90^{\circ}\;\;\&\;\;\angle{C}\,<\,90^{\circ}}$

$\textsf{Hence the greatest angle of right angle isoceles triangle is}\,\mathsf{90^{\circ}}$

$\therefore\textsf{Option (1) is correct}$

Answer 2

Answer:

Answer is 90°

Step-by-step explanation:

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